JPH0318870Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a heat exchanger with an improved assembly structure.

[Technical background and problems of the invention] Conventional heat exchangers used in water heaters, etc., are made of a pair of plate-shaped heat exchangers obtained by extruding aluminum or the like, as shown in Figures 5 and 6, for example. It is mainly composed of members a and b, side plates c and d that close open portions at both ends thereof, and an upper plate e that closes the open upper portion. circulation pipe f
However, a plurality of fins (g) were provided on the inner wall surface.

However, since the heat exchanger was constructed such that the side plates c, d and the top plate e were assembled to the plate members a, b with screws, the following drawbacks occurred.

Since the heat from the side plates c and d is not easily transmitted to the plate members a and b, the temperature of the side plates c and d becomes extremely high.

Therefore, it is necessary to use a highly heat-resistant metal (stainless steel, etc.) as the material for the side plates c and d, which increases costs.

Furthermore, thermal distortion occurs between the side plates c, d and the plate-like members a, b due to non-uniform temperatures, resulting in a decrease in durability.

Furthermore, since it is screwed, assembly is time consuming.

It was also necessary to seal the gaps between the threaded joints to prevent combustion gas from leaking.

[Purpose of the invention] The present invention was made in consideration of the above circumstances, and is capable of easily transmitting heat from the side plate to the plate-like member, has less uneven temperature, has good durability, and is easy to manufacture. The purpose is to provide an easy and inexpensive heat exchanger.

[Summary of the invention] In order to achieve the above object, the present invention forms continuous fins vertically at appropriate intervals along the horizontal longitudinal direction on the opposing inner wall surfaces of a pair of opposing plate-like members, and In a heat exchanger in which a circulating pipe for a heated fluid is disposed on a wall surface, both open ends of a plate-like member are closed with side plates, and fins at the uppermost end of the plate-like member are welded to each other to form an upper plate, The structure is such that the side plates are welded to the open ends of the plate member.

[Embodiment of the invention] An embodiment of the invention will be described below in detail based on the accompanying drawings.

As shown in FIGS. 1 and 2, a heat exchanger 1 according to the present invention includes a pair of plate-like members 2 and 3 obtained by extrusion molding aluminum or the like, and a space between these plate-like members 2 and 3. It is mainly composed of side plates 4 and 5 that close open portions at both ends.

The plate members 2 and 3 are each divided into three parts in the vertical direction, and these divided pieces 2a, 2b, 2c, 3a, 3
Engagement parts 6 and 7 that engage with each other are formed at the joint ends of b and 3c as shown in FIG. etc.) is applied or filled.

Although the engaging portions 6 and 7 are composed of a convex portion and a concave portion into which the convex portion is fitted, the present invention is not limited to this.

As shown in FIG. 4, on the opposing inner wall surfaces of the plate members 2 and 3, continuous fins 9 are provided along the horizontal longitudinal direction.
are formed at appropriate intervals in the vertical direction, and in particular, the lengths of the topmost fins 9a and 9b are set equal to the width of the plate members 2 and 3, while the remaining fins 9 are horizontally spaced as shown in FIG. The fins 9 are arranged with a certain positional shift in the direction, and are configured to guide combustion gas along the fins 9. Further, on the outer wall surfaces of the plate members 2 and 3, a circulating pipe 10 for the fluid to be heated is arranged in a horizontal meandering manner. In this case, the plate members 2, 3
A pipe holding piece 11 for fixing the circulation pipe 10 is formed on the outer wall surface of the pipe holding piece 1.
The circulation pipe 10 is fixed by caulking 1 or the like.

The upper plate 13 of the heat exchanger 1 is formed by joining the uppermost fins 9a and 9b to each other by welding 12. Further, the side plates 4 and 5 are joined to the open ends of the plate members 2 and 3 by copper welding, respectively.

A burner is connected to the lower open part of the heat exchanger 1, and after the combustion gas from the burner moves along the fins 9 and exchanges heat with the fluid to be heated in the circulation pipe 10, the combustion gas is transferred to one side plate. The air is discharged from an exhaust pipe 14 formed at 4.

Therefore, as mentioned above, the uppermost fins 9a, 9b
Since the upper plate 13 is formed by welding and joining them together, there is no need to separately manufacture the upper plate 13.
In addition, it is inexpensive because it requires fewer welding steps than when welding and joining separate upper plates.

In addition, since the side plates 4 and 5 are joined to the plate members 2 and 3 by welding, the heat of the side plates 4 and 5 can be sufficiently transmitted to the plate members 2 and 3, and excessive temperature of the side plates 4 and 5 can be prevented. As a result, the temperature of the surrounding electrical parts, etc. can be kept low, and durability can be improved. Since the temperature of the side plates 4 and 5 does not get very high, there is no need to use high-grade materials with high heat resistance.
It can be manufactured from cheap and lightweight materials such as aluminum, which is the same as the plate members 2 and 3, which contributes to cost reduction, and since the same material is made of the same material with less unevenness in temperature, it is less prone to thermal distortion and is durable. Improves sex.
Moreover, since it is a welded joint, unlike screw fastening, it has high airtightness and is easy to manufacture.

Furthermore, since the plate-like members 2 and 3 are divided into a plurality of parts and the plate-like members 2 and 3 are constituted by these constituent pieces 2a, 2b, 2c, 3a, 3b, and 3c,
Easy to mold. Moreover, the component pieces 2a, 2b,
2c, 3a, 3b, and 3c are formed with engaging portions 6 and 7 that engage with each other, so assembly of the plate members 2 and 3 is easy, and it is less expensive and less thermally stressed than joining by welding. can escape, and thermal distortion is less likely to occur. In addition, since the heat conductive sealing material 8 was filled between the engaging parts 6 and 7, the constituent pieces 2a, 2b, 2c, 3a, 3b,
There is no non-uniformity in temperature among the parts 3c, and there is no risk of combustion gas leaking between the components.

[Effects of the invention] In summary, the present invention provides the following excellent effects.

(1) Since the side plate was joined to the plate member by welding,
Heat applied to the side plate by the combustion gas can be easily transferred to the plate member, and excessive overheating of the side plate can be prevented.

(2) For this reason, the side plates themselves do not need to be made of a highly heat-resistant material, so the same inexpensive and lightweight material as the plate member can be used, reducing temperature unevenness and increasing heat resistance. It is possible to prevent distortion from occurring and improve durability.

(3) In particular, since the uppermost fins are welded together to form the upper plate, there is no need to manufacture the upper plate separately, and compared to the case where separate upper plates are welded together, It requires less man-hours, is inexpensive and easy to manufacture.

(4) Since welded joints are used, unlike conventional screw-fastening structures, assembly is not labor-intensive and sealing performance can be improved.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of the heat exchanger according to the present invention, Fig. 2 is a side view of the same, Fig. 3 is an enlarged sectional view taken along the line X-X in Fig. 1, and Fig. 4 is a Y-- A Y-line enlarged cross-sectional view, Figure 5 is a partially cutaway front view of a conventional heat exchanger,
FIG. 6 is a side view of the same. In the figure, 2 and 3 are plate members, 4 and 5 are side plates, 9 is a fin, 10 is a circulation pipe, 12 is an upper plate, and 6, 7
is an engaging member.

Claims (1)

[Claims for Utility Model Registration] (1) Continuous fins are formed along the horizontal longitudinal direction at appropriate intervals in the vertical direction on the opposing inner wall surfaces of a pair of opposing plate-like members, and the heated fluid is applied to the outer wall surface. In a heat exchanger in which a circulation pipe is installed, the open ends of the plate-shaped member are closed with side plates, and the fins at the top end of the plate-shaped member are welded to each other to form an upper plate, and both ends of the plate-shaped member are closed. A heat exchanger characterized in that the side plate is welded to the open part. (2) The above-mentioned plate-like member is divided into a plurality of parts, each of which has an engaging part that engages with each other at the end of each divided component piece, and a heat conductive sealing material is filled between these engaging parts. A heat exchanger according to claim 1, which is characterized in that the heat exchanger is characterized in that: